<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="./style/direction.css">
</head>

<body>
    <h3>direction演示</h3>
    <div class="direction">
        <div>
            <p>normal演示</p>
            <div class="normal box">动画按正常播放</div>
        </div>
        <div>
            <p>reverse演示</p>
            <div class="reverse box">动画反向播放</div>
        </div>
        <div class="ex">
            <p>alternate演示</p>
            <div class="alternate box">动画在奇数次正向播放，在偶数次反向播放</div>
        </div>
        <div class="ex">
            <p>alternate-reverse演示</p>
            <div class="alternate-reverse box">动画在偶数次正向播放，在奇数次反向播放</div>
        </div>
    </div>
</body>

</html>